1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ca5763896273047703e433a8e64c9a9915e221b30ca4ee95ed04e81e9efbed. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7ec9a03-5f01-41a9-900d-300aebe2ef2b.json and https://artists.proofprofile.net/proofs/artist/e7ec9a03-5f01-41a9-900d-300aebe2ef2b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb78af04d20b881db7a592e7c13493f86db64dff5d68bfb4cc1248090426ae7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ41912238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e814da16468a5d78484979c83e9db77bb7740c5a879d337348f003dd103fa2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ41912242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc53444d80558adb737bbc30ba835bace7597649fe9c140cfbfb7b85aea1145e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ41912245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc587909b0b9c7f851b9a28e6ee0cb15549233d237f27dd0aec8f658b6484d8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:40:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2025969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279c333f8343bcb6ba1de4f8cadd5d3ee6de266aad5a283462471bd9b4fae4ed. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2025970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f07dae91b7ccf4fbbc22515d14e736a43556db7a9d857a90594a865c2ccbed. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:53:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2025971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105d73f5b8b83bf2458073ce5c014a6a4768ea6fe82702e437cfe6334884dd68. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2025973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ca32641449bfa92fca391a0485c9b4fbf8e24a43a1e854fc02df61f66c36da. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2025974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cd340209b313ccd9bd577d9372c7d701223225a59230b2711f1cb874fa5148. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2025975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319e94ff2c369b3ade738c6731ea7cbd57f12c85e77ed14ef9fc3cca085bb218. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:48:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2025976.